1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/***
*streamb.h - definitions/declarations for the streambuf class
*
* Copyright (c) 1990-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* This file defines the classes, values, macros, and functions
* used by the streambuf class.
* [AT&T C++]
*
****/
#ifndef _INC_STREAMB
#define _INC_STREAMB
#ifndef EOF
#define EOF (-1)
#endif
// Force word packing to avoid possible -Zp override
#pragma pack(2)
typedef long streampos, streamoff;
class streambuf {
public:
inline int in_avail() const;
inline int out_waiting() const;
int sgetc();
int snextc();
int sbumpc();
void stossc();
inline int sputbackc(char);
inline int sputc(int);
int sputn(const char*,int);
int sgetn(char*,int);
virtual int sync();
// enum seek_dir { beg=0, cur=1, end=2 }; // CONSIDER: needed ???
virtual streambuf* setbuf(char *, int);
virtual streampos seekoff(streamoff,ios::seek_dir,int =ios::in|ios::out);
virtual streampos seekpos(streampos,int =ios::in|ios::out);
virtual int xsputn(const char*,int);
virtual int xsgetn(char*,int);
virtual int overflow(int =EOF) = 0; // pure virtual function
virtual int underflow() = 0; // pure virtual function
virtual int pbackfail(int);
void dbp();
protected:
streambuf();
streambuf(char*,int);
virtual ~streambuf();
inline char* base() const;
inline char* ebuf() const;
inline char* pbase() const;
inline char* pptr() const;
inline char* epptr() const;
inline char* eback() const;
inline char* gptr() const;
inline char* egptr() const;
inline int blen() const;
inline void setp(char*,char*);
inline void setg(char*,char*,char*);
inline void pbump(int);
inline void gbump(int);
void setb(char*,char*,int =0);
inline int unbuffered() const;
void unbuffered(int);
int allocate();
virtual int doallocate();
private:
int _fAlloc;
int _fUnbuf;
int x_lastc;
char* _base;
char* _ebuf;
char* _pbase;
char* _pptr;
char* _epptr;
char* _eback;
char* _gptr;
char* _egptr;
};
inline int streambuf::in_avail() const { return (gptr()<_egptr) ? (_egptr-gptr()) : 0; }
inline int streambuf::out_waiting() const { return (_pptr>=_pbase) ? (_pptr-_pbase) : 0; }
inline int streambuf::sputbackc(char _c){ return (_eback<gptr()) ? *(--_gptr)=_c : pbackfail(_c); }
inline int streambuf::sputc(int _i){ return (_pptr<_epptr) ? (unsigned char)(*(_pptr++)=(char)_i) : overflow(_i); }
inline char* streambuf::base() const { return _base; }
inline char* streambuf::ebuf() const { return _ebuf; }
inline int streambuf::blen() const {return ((_ebuf > _base) ? (_ebuf-_base) : 0); }
inline char* streambuf::pbase() const { return _pbase; }
inline char* streambuf::pptr() const { return _pptr; }
inline char* streambuf::epptr() const { return _epptr; }
inline char* streambuf::eback() const { return _eback; }
inline char* streambuf::gptr() const { return _gptr; }
inline char* streambuf::egptr() const { return _egptr; }
inline void streambuf::gbump(int n) { if (_egptr) _gptr += n; }
inline void streambuf::pbump(int n) { if (_epptr) _pptr += n; }
inline void streambuf::setg(char * eb, char * g, char * eg) {_eback=eb; _gptr=g; _egptr=eg; x_lastc=EOF; }
inline void streambuf::setp(char * p, char * ep) {_pptr=_pbase=p; _epptr=ep; }
inline int streambuf::unbuffered() const { return _fUnbuf; }
inline void streambuf::unbuffered(int fUnbuf) { _fUnbuf = fUnbuf; }
// Restore default packing
#pragma pack()
#endif /* !_INC_STREAMB */
|
